I have had this in my 100ct humidor for about a month now and I still can't get over 65%. It fluctuates from 60-65% throughout the week. I have about 50 cigars in there too so it might just need another one added.

This does help to regulate the humidity, but it won't keep my 25-50 cigar humidor at 70% on its own. I use it in conjunction with the cheap little humidifier that came with a 20 cigar humidor I ordered a while back. The combination has it right at 70% according to my hygrometer, but alone the jar had it just below 60% (~57%). I would only recommend this if you are going to use something else with it. Then it works great!! Also, if you have a shallow humidor, (for say 20 cigars) it won't fit, it is too tall. I have 2 humidors and it will only fit in my larger 25-50 cigar humidor. However, if you had a 100-150 cigar humidor I would get at least 2 of these to do the job.

Great product! Just unscrew the cap and place in your humidor. I have 50+ count humidor with about 25 cigars and this Xikar product keeps the humidity at 71%. Throw out that green sponge and get one of Xikar's crystal humidifiers. Makes life so much easier.

Great insurance for your investment, this product actually enhances smoking everyday. Each cigar is CONSISTENTLY maintained at the optimum moisture level. Allows one to purchase not-so-great cigars and improve the burn and smoke-ability. Only rated it a 4 because I don't yet know how long the jar will last (split among 3, 20 cigar humidors)

I have a 125 cigar humidor. Was having trouble getting & keeping humidity at 70% with humidifier that came with humidor. Started using Xikar 4 oz. gel jar about 3 months ago - problem appears to be resolved. Very happy...would definitely recommend.

No easier or more consistent humidification devices available for large capacity humidors and coolidors than these silica gel and propylene glycol jars. They last a very long time and as propylene glycol has very low vapor pressure and does not evaporate like water, you can refill with just plain distilled water multiple (as in five or six or more) times without needing to recharge with expensive 50/50 cigar juice propylene glycol/water solutions.

If you're looking to use humidification beads, these devices are perfect for getting those beads pre-conditioned (or re-conditioned) to the desired 65-70 percent RH setpoint. Just take your beads and put them in a sealed container along with an open jar of the Xicar 4 oz gel and let the combination sit undisturbed for several days to a week. Your beads are now conditioned to the proper RH and your Xicar gel is ready to be recharged (if needed) with additional distilled water. Using both the Xicar gel and humidity beads in your humidor/coolidor makes for the ultimate humidification combo.

Keeps my humidor at the perfect humidity without having to change out the water constantly. Also you can use normal distilled water for your humidification and have this in the humidor as well and it will eliminate the potential of mold.